21604720

素因数分解:

$2^4\times 5^1\times {\mathrm{270059}}^1$

素因数の和:270072

約数の個数: 20

約数和(自身を含む): 50231160

約数和(自身を除く): 28626440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270059, 540118, 1080236, 1350295, 2160472, 2700590, 4320944, 5401180, 10802360, 21604720]

約数ペア:

[(1, 21604720), (2, 10802360), (4, 5401180), (5, 4320944), (8, 2700590), (10, 2160472), (16, 1350295), (20, 1080236), (40, 540118), (80, 270059)]